Bug 1406278 – CVE-2016-10010 openssh: privilege escalation via Unix domain socket forwarding

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Bug 1406278 - (CVE-2016-10010) CVE-2016-10010 openssh: privilege escalation via Unix domain socket forwarding

Summary:	CVE-2016-10010 openssh: privilege escalation via Unix domain socket forwarding

Status:	CLOSED NOTABUG

Aliases:	CVE-2016-10010

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20161219,reported=2...
Keywords:	Security

Depends On:	1406296 1410321
Blocks:	1406299 1415638
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Reported:	2016-12-20 03:03 EST by Martin Prpič
Modified:	2017-07-19 01:44 EDT (History)
CC List:	7 users (show)

See Also:
Fixed In Version:	openssh 7.4
Doc Type:	If docs needed, set a value
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Story Points:	---
Clone Of:
Environment:
Last Closed:	2017-01-05 01:56:08 EST
Type:	---
Regression:	---
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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Description Martin Prpič 2016-12-20 03:03:06 EST

It was found that when privilege separation was disabled in OpenSSH, forwarded Unix-domain sockets would be created by sshd with root privileges instead of the privileges of the authenticated user. This could allow an authenticated attacker to potentially gain root privileges on the host system.

Note: privileges separation has been enabled by default since OpenSSH 3.3/3.3p1 (2002-06-21). Thus, OpenSSH in any version of RHEL is not affected by default. An affected OpenSSH configuration would have to specifically disable privilege separation with the "UsePrivilegeSeparation no" configuration directive in  /etc/ssh/sshd_config. More information is also available in https://access.redhat.com/solutions/1354953 .

CVE assignment:

http://seclists.org/oss-sec/2016/q4/708

Upstream patch:

http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/serverloop.c.diff?r1=1.188&r2=1.189&sortby=date&f=h

Comment 1 Martin Prpič 2016-12-20 03:03:23 EST

External References:

https://www.openssh.com/txt/release-7.4

Comment 2 Andrej Nemec 2016-12-20 03:41:22 EST

Created openssh tracking bugs for this issue:

Affects: fedora-all [bug 1406296]

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